1、How Bogies Work?TANG YangMonday, July 11, 20221 精品PPT Whats a bogie?Definition from : a chassis or framework carrying wheels, attached to a vehicle. Definition from Textbook Che Liang Gong Cheng (Vehicle engineering): a wheeled wagon or trolley comprising two or more wheelsets connected by special f

2、rame or side frame, attached to a vehicle.2 精品PPT Names轉(zhuǎn)向架 (Zhuan Xiang Jia) or 走行部 (Zou Xing Bu) in ChinaBogie in the UK Truck in the USA, Canada and Mexico臺車 (, from trolley)，in Japan3 精品PPT Roles of bogieSupport carbody firmlyRun stably on both straight and curved trackEnsure good ride comfortMin

3、imize generation of track irregularities and rail abrasion.4 精品PPT Development in axle numberTwo axles, one railcarThree axles, one railcarTwo two-axle bogie, one railcar (most common for passenger, freight cars, metro, LRT and high speed locomotives)Two three-axle bogie, one railcar (most common fo

4、r freight locomotives)Articulated bogie, two railcars (TGV EMU)More than three axles in one bogie, or more than two bogies in one railcar5 精品PPT Development in axle load10t at the beginning of railway.The Maximum value is 25t in China, especially for Freight car, 3237t in America.For passenger train

5、s, the limit of axle load is always less than 17t.6 精品PPT Two axles, one railcar7 精品PPT Two axles, one railcar (carriage)8 精品PPT Two axles, one railcar (gondola)9 精品PPT 10 精品PPT 9、 人的價值，在招收誘惑的一瞬間被決定。2022/7/112022/7/11Monday, July 11, 202210、低頭要有勇氣，抬頭要有低氣。2022/7/112022/7/112022/7/117/11/2022 10:53:19

6、 PM11、人總是珍惜為得到。2022/7/112022/7/112022/7/11Jul-2211-Jul-2212、人亂于心，不寬余請。2022/7/112022/7/112022/7/11Monday, July 11, 202213、生氣是拿別人做錯的事來懲罰自己。2022/7/112022/7/112022/7/112022/7/117/11/202214、抱最大的希望，作最大的努力。11 七月 20222022/7/112022/7/112022/7/1115、一個人炫耀什么，說明他內(nèi)心缺少什么。七月 222022/7/112022/7/112022/7/117/11/202216

7、、業(yè)余生活要有意義，不要越軌。2022/7/112022/7/1111 July 202217、一個人即使已登上頂峰，也仍要自強不息。2022/7/112022/7/112022/7/112022/7/11For more detailsSee also: /wiki/Ffestiniog_Railway 12 精品PPT 9、 人的價值，在招收誘惑的一瞬間被決定。2022/7/112022/7/11Monday, July 11, 202210、低頭要有勇氣，抬頭要有低氣。2022/7/112022/7/112022/7/117/11/2022 10:53:19 PM11、人總是珍惜為得到。

8、2022/7/112022/7/112022/7/11Jul-2211-Jul-2212、人亂于心，不寬余請。2022/7/112022/7/112022/7/11Monday, July 11, 202213、生氣是拿別人做錯的事來懲罰自己。2022/7/112022/7/112022/7/112022/7/117/11/202214、抱最大的希望，作最大的努力。11 七月 20222022/7/112022/7/112022/7/1115、一個人炫耀什么，說明他內(nèi)心缺少什么。七月 222022/7/112022/7/112022/7/117/11/202216、業(yè)余生活要有意義，不要越軌。

9、2022/7/112022/7/1111 July 202217、一個人即使已登上頂峰，也仍要自強不息。2022/7/112022/7/112022/7/112022/7/11Three axles, one railcar14 精品PPT Three axles, one railcar (carriage)15 精品PPT Two two-axle bogies, one railcar (gondola)16 精品PPT Two two-axle bogies, one railcar (carriage)17 精品PPT Three two-axle bogies, one railc

10、ar (locomotive)18 精品PPT Two two-axle bogies, one railcar (High speed locomotive)19 精品PPT One two-axle bogie, two railcars (TGV)20 精品PPT 21 精品PPT 22 精品PPT 23 精品PPT 24 精品PPT Two four-axle bogies, one railcar (flat car)25 精品PPT Four four-axle bogies, one railcar (depressed center flat car)26 精品PPT Etat

11、 Railway 4 axled bogie railcar ZZy24091 is one of the famous Bugatti vehicles. This is one of the Presidential type. May 30 2021 27 精品PPT Two five-axle bogies, one railcar (flat car)28 精品PPT Four eight-axle bogies, one railcar (schnabel car)29 精品PPT Development in bogie suspensionNo suspensionOne su

12、spension (freight cars)Two suspensions (most common in modern passenger cars and locomotives)Three suspensions (rare, only for special purposes)30 精品PPT One-suspension bogie31 精品PPT One-suspension bogie32 精品PPT Two-suspension bogie33 精品PPT Three-suspension bogie34 精品PPT How a two-suspension bogie su

13、pports the vehicle body?35 精品PPT 36 精品PPT 37 精品PPT One suspension bogie(cast steel bogie)38 精品PPT Equaliser Bar Suspension39 精品PPT Rubber Suspension 40 精品PPT Air Suspension 41 精品PPT 42 精品PPT How a bogie runs on the track?The shape and location of wheels and rails on straight track 43 精品PPT The shape

14、 and location of wheels and rails on curved track 44 精品PPT Negotiating curve of Railcar with two bogies45 精品PPT 46 精品PPT A modern UK power bogie47 精品PPT Bogie FrameCan be of steel plate or cast steel. In this case, it is a modern design of welded steel box format where the structure is formed into h

15、ollow sections of the required shape.Bogie TransomTransverse structural member of bogie frame (usually two off) which also supports the carbody guidance parts and the traction motors.Brake CylinderAn air brake cylinder is provided for each wheel. A cylinder can operate tread or disc brakes. Some des

16、igns incorporate parking brakes as well. Some bogies have two brake cylinders per wheel for heavy duty braking requirements. Each wheel is provided with a brake disc on each side and a brake pad actuated by the brake cylinder. A pair of pads is hung from the bogie frame and activated by links attach

17、ed to the piston in the brake cylinder. When air is admitted into the brake cylinder, the internal piston moves these links and causes the brake pads to press against the discs. A brake hanger support bracket carries the brake hangers, from which the pads are hung.48 精品PPT Primary Suspension CoilA s

18、teel coil spring, two of which are fitted to each axlebox in this design. They carry the weight of the bogie frame and anything attached to it.Motor Suspension TubeMany motors are suspended between the transverse member of the bogie frame called the transom and the axle. This motor is called nose su

19、spended because it is hung between the suspension tube and a single mounting on the bogie transom called the nose.GearboxThis contains the pinion and gearwheel which connects the drive from the armature to the axle.Lifting LugAllows the bogie to be lifted by a crane without the need to tie chains or

20、 ropes around the frame.49 精品PPT MotorNormally, each axle has its own motor. It drives the axle through the gearbox. Some designs, particularly on tramcars, use a motor to drive two axlesNeutral Section Switch DetectorIn the UK, the overhead line is divided into sections with short neutral sections

21、separating them. It is necessary to switch off the current on the train while the neutral section is crossed. A magnetic device mounted on the track marks the start and finish of the neutral section. The device is detected by a box mounted on the leading bogie of the train to inform the equipment wh

22、en to switch off and on.50 精品PPT Secondary Suspension Air BagRubber air suspension bags are provided as the secondary suspension system for most modern trains. The air is supplied from the trains compressed air system.Wheel Slide Protection System Lead to AxleboxWhere a Wheel Slide Protection (WSP)

23、system is fitted, axleboxes are fitted with speed sensors. These are connected by means of a cable attached to the WSP box cover on the axle end.Loose Leads for Connection to CarbodyThe motor circuits are connected to the traction equipment in the car or locomotive by flexible leads shown here.Shock

24、 AbsorberTo reduce the effects of vibration occurring as a result of the wheel/rail interface.Axlebox CoverSimple protection for the return current brush, if fitted, and the axle bearing lubrication.51 精品PPT Your PresentationEach group consists of 3 students, the first one for general introduction to your bogie, second for the major structures and functions, and the third one for its features,10 minutes.Self-steering Radial Bogie 自導(dǎo)向徑向轉(zhuǎn)向架Force-steering Radial Bogie 迫導(dǎo)向徑向轉(zhuǎn)向架(Bogie of C